Alkenes and ketones are easily hydrosilylated by tris(trimethylsilyl)silane ( 1) via a radical mechanism, initiated by photolysis or a radical initiator. In the case of 1,6-dienes or 1-en-6-ones, the intermediate silylalkyl or siloxyalkyl radical, respectively, is trapped intramolecularly to... mehr

Alkenes and ketones are easily hydrosilylated by tris(trimethylsilyl)silane ( 1) via a radical mechanism, initiated by photolysis or a radical initiator. In the case of 1,6-dienes or 1-en-6-ones, the intermediate silylalkyl or siloxyalkyl radical, respectively, is trapped... mehr

A series of new chiral diselenides with a N-atom in the side chain was prepared by a short synthetic sequence (Scheme 1). Only 1 mol-% of these diselenides catalyzed very effectively the diethylzinc addition to various aromatic and α,β-unsaturated aldehydes yielding the secondary alcohols in up... mehr

Previous assignment of the signals in the spectra of carboxymethylcellulose, based on an incremental calculation and hence on low-molar-mass model substances, made determination of the partial degree of substitution fundamentally impossible because overlapping of the relevant signals was... mehr

Two synthetic pathways towards 4′-C-acylthymidines are presented. These modified mononucleosides are precursors of the 2′-deoxyribonucleotide 4′-C-radical. They were converted into their corresponding 3′-O-[(2-cyanoethyl) N,N-diisopropylphosphoramidites] 3a-c and incorporated in... mehr